Preserve usable slot size when RVALUE_OVERHEAD is non-zeroHEADmaster

We made a mistake calculating slot sizes during the heap slot sizes
refactor. Previously BASE_SLOT_SIZE included RVALUE_OVERHEAD, this was
lost during the refactor to use the SLOT macro.

The result of this was that when Ruby was compiled with -DRUBY_DEBUG it
was assumed that the last word of each slot was RVALUE_OVERHEAD. Because
this hadn't been taken into account at allocation time, all slots were
effectively one word shorter.

This PR adds RVALUE_OVERHEAD to the size calcualted in the SLOT macro
directly, so it will be added on to the physically allocated size at
allocation time.

0 files changed, 0 insertions, 0 deletions